DE2702575A1 - DEVICE FOR WRAPPING A CABLE SPLICE AND METHOD OF MANUFACTURING IT - Google Patents

Description

. • ie .... rfindixn.h-: see r.icli on vin V * trf? Hr «ri" i vu'id ine device üUKi fixed UiiiDChlieilen vcü cable parts uöd hot li'jhr in individual ci.ii; production; ' a :: · represent "cn Ki m Gt ß to fill Rhülluiii-r for a Kabulsplc-iß zum üegenstri'.d, in which the · ΖΧΜΛ enclosing the rigid plastic used. materials do not necessarily raise the one v / irklichon conclusion to the near ^ cv / ahrlt; intcn.

In the case of iutzanv / endunt'en under the; .rde, Kpbe lun £; en zueliraende / jiv / end-unp found, fell de;! ·, undt -! 'earthly ..- insets oüascn die Kabclr.pleiße vrasseralcht, for Inp.uktcn » Mushrooms Ad. inaccessible and relatively strong. Un dieHen various strict requirements to meet are several types of cable splice casing have been devised.

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These known devices use in general a rigid outer construction that is filled with a waterproof material. To the normally The waterproof fillers used include non-drying substances that cannot be mixed with basser are, powders and resins that harden in the coating.For non-drying substances and powders, it is necessary to Provide a rigid outer structure to support the cable splice. Furthermore, in such cases an outer housing is required to maintain a permanent leak-proof facility and erosion and destruction of the enclosed therein, non-solid, i.e. liquid or powdery material for waterproofing to prevent.

Such leak-tight, rigid jacket constructions require detailed contagion procedures in which the cables are sheathed and wrapped with tape at each end of the jacket construction, in which case the housing is sealed and filled with a waterproof mixture will. As a result of these detailed assembly processes, these finished cable splice covers are generally expensive and can also be ineffective because of the high risk of building errors.

V / o resins for a moisture-proof internal construction other problems arise. The heat generated during the hardening reaction can burst the hardening resin, thereby reducing its rigidity and water tightness of the final construction The use of resins also requires considerable

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Borrowed time, which is usually about 45 minutes the splice is absolute be kept quiet to prevent the formation of passages for ingress of water. Consequently does the use of resins give rise to a high level of security » possibility of an error in; inbeu with itself and increases also the cost of splice wrapping. In addition, the resin has the tendency to leak quickly from the case, before it begins to cease if the outer housing is not made leakproof. Housing with Harzverguß-Umhülluiicen must therefore have a support structure for the resin to ensure a stiff and watertight splice enclosure.

The object of the invention eats to avoid these iJach parts and to specify a strong and watertight enclosure for a cable splice and a method for making it, which can be produced with little effort and very easily on the construction site and via a lanßen period tightness and mechanical resistance guaranteed.

According to the invention, this problem is solved in the claims mentioned shaking solved.

The apparatus of the invention uses ußerikonstruktion a ⁱ *, or which has / asserdichtigkeit of the complete wrapping do not significantly increase the rigidity and V form. The iußenkonstruktion cebildet is generally from zuseinmtndrückbaren Gchaumkunststoffteilen, ^ _e ^ _m distance from the splice are arranged around the cables. U.N

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down the cable splice is flat-nfo * naive material arranged, the sealing against the foam plastic thanks to its compressibility and illasticity is pressed. A rigid plastic compound then belongs to the complete envelope, which surrounds the cable splice and penetrates the cable splice. This solid plastic compound forms the support structure and provides the complete cable splice enclosure their waterproofness. Resins that have been activated to cure to a hard structure can easily handled with such an auxiliary form.

Activated plastic that foams into a hard structure can also be advantageously used with these shapeless outer housings or molds. The ausschäumenden plastics filters after completion Ausschäumvorgeng also a real thermal insulation for the splice. The flexible sheet material and the flexible ^r chaunkun st plastic parts v / erdon superfluous as a supporting structure or water-sealing elements of the envelope.

Several advantages are achieved by this device and the method for making it. Since the foam plastic, which is wrapped around the cables at the end or ends of the mold or housing, compressible and is elastic, the outer film can be pressed around the foam plastic quickly and easily Establish a seal that will prevent leakage of resin or foaming plastic prevents the formation of the internal structure of the filling. The time to get together

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ORIGINAL INSPECTED

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The internal construction of the Lipleiss casing is significantly lower, because the activated plastic forms within a few minutes. The envelopes from activated iiarz can be hardened without fear of leakage, "If foaming plastic is used, the Furthermore, there is a tendency to flow until it finally becomes stiff. As a result, it is not necessary to hold the splice absolutely when the plastic hardens.

Due to the simplicity of construction and ability des .chaunes to expand into all cavities, the possibility of an installation error is very low, and all errors during the installation are either immediately apparent, or they are revealed by the effect of the show rendered harmless. As a result, the total cost for. labor and material significantly reduced. In this way, the invention offers an essential one Advantage over the previously used non-drying and resin-containing cover, which has a rigid housing and requires gaskets made of mastic and tape.

Further features and advantages of the invention emerge from the following description of exemplary embodiments, which are explained in more detail with reference to the drawings. La shows:

Fig. 1 is an exploded perspective view

Representation of a device according to the invention, which in a splice in a straight cables are used,

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ORIGINAL INSPECTED

fonritHl Lin · ;; Product a υτο'ΐην

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ff

Ti, .. 2 is a front view of an assembled Ilabelspleiß-Ujahüllung according to the invention, as shown in Fig. 1 and in which a part is shown in section,

Fi ;;. 3 another example in connection with «-ir, era 3pleÜ3 of two juxtaposed gönrten Cables in a front view,

; 'i _t;. 4 shows the object of FIG. 3 in a longitudinal section along line 4-4,

l ^: ii · .. L- another exemplary embodiment of the arfinriuriß wit a .plaiss of two straight cables lying next to one another, in which the Uiuhüllunt, Hai * z is used, and

Ti; .. K a Abwanilluiiß of the in Fig. 1 and 2 v \ argoste-llten i.ui; fülorun _i :; sbeispiele3, with v / elcljer the envelope can be opened again.

.- ^ i dta in deix Fi,] ,. 1 and 2 shown embodiment example ict with 10 a jpleiB of two cables 12 and J.'f.-r.eicimct. About iploifl is from the incoming wires ! tr »\ abol L; uno 14 /. formed individually with each other rurch. ^ rchtspleiße 16 are connected, i'.usscrdeo is a -.r / NutzkontaVt connector 1ö provided. The opleiss 10, the lsabel 1 ?: and 14 and the earthing contact connector 1ö ; .or: rion all eiric have the usual forta and construction.

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The entire cable splice is covered by a cable sheath enclosed. At this first execution forum a flexible outer frame belongs to the cable split-lira casing, dor is designated in its entirety with 20 and a flexible cover 22 and compressible i 'end seals 24 and 26. In assembled State form the jacket 20 around the cable splice 10 and the jidhs of cables 12 and 14 closed one end Inn & nraum.

The flexible cover 22 can be in its most suitable Form made of a tube made of polyethylene. This polyethylene hose is folded in the iiltte, to form a two-layer strip 20. ~> r is stapled together along lines 30 and 32. These Stapling can be accomplished by running a heating element along these lines.

The rectangular strip 28 thus formed is flexible and can have remarkable tensile strength. The indentation along lines 30 and 32 serves primarily convenient handling.

Strips 34 and 36 can be arranged in a suitable manner between the stitching lines and the folds of the tube. These strips 34 and 36, when placed in the edges of the rectangular strip 28, form a rigid construction with which the jacket 20 can be closed around the splice 10. To hold the Bars 34 and 36 are provided with slots 30 in the bars. These slots 38 are aligned with each other and take

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Attachment swivel 40, which is preferably at one end Pointed to keep them in area penetrate the slots 38 in the polyethylene tube can. Near the putty of the fastening elements there is a constriction 42 so that the fastening vertebrae 40 rotate in the slots 33 can. The wider ends of the fastening elements 40 can not be pulled out of the strips 34 and 36 will.

The strips 34 and 36 and the fastening vertebrae 40 are made preferably made of strong plastic or metal so that they can absorb the tensile forces caused by the expanding foam described below can be applied to the flexible strip 28. The number of Fasteners 40 and the slots 38 depend on the stiffness of the strips 34 and 36, which is expected Pressure of the expanding foam introduced into the jacket and the length of the envelope.

The compressible end seals 24 and 26 are on both ends of the flexible strip 23 attached to the inside thereof. For attaching these seals to the Strip 26, epoxies or other adhesives can be used. The end seals 24 and 26 are made preferably made of a compressible foam plastic, such as, for example, made of polyurethane or expanded Neoprene, which is also elastic to allow the compressed material to expand and fit tightly to the Cable and the sheath can put on.

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So that the end seals 24 and 26 do not come into conflict with the connection of the strips 34 and 36, the end seals 24 and 26 may only extend into an area which is in the vicinity of the tail lines 30 and 32. It is advantageous if the height of each end seal 24 and 26 is so great that each end seal 24 and 26 is pressed around the cables 12 and 14 when the strips 34 and 36 are joined together. The width of each end seal 24 and 26 is preferably so great that the seal cannot be knocked over beforehand and flow out expanding foam that has been introduced into the shell. End seals that are twice as wide as their thickness have been found to be completely satisfactory.

These flexible and compressible end seals 24 and 26 made of foam plastic replace the known putty and the hand. The resilience and compressibility of the flexible end seals 24 and 26 allow easy assembly of the flexible ones Plastic film 28 and the spliced together Cable 12 and 14.

The known method of sealing open ends between a housing and spliced cables is under way in that first putty is applied, then the housing is pressed over the putty, more putty is added and eventually the whole area is covered with tape. This procedure requires skill and a considerable amount of time. In addition, in particular is cool cousins when the putty isn't sticky, «be

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good wrapping is not guaranteed.

The new seals 24 and 26 are not intended to to prevent moisture penetration, but rather there with the remaining part of the envelope to cooperate and form the perimeter of the hard foam plastic it is later introduced into the envelope.

The plastic 44 is activated for foaming and then poured into the jacket 20. The activated plastic can then foam and that of the jacket 20 Fill in formed iiaum. The spliced cables can be brought into position either before or after the activated plastic 44 is poured into the jacket 20.

After the plastic 44 has been poured into the jacket 20, the strips 34 and 36 are put together and held together by the fastening vertebrae 40. The activated plastic 44 can then expand to to fill in the interior.

^ 6 is advantageous to have enough activated plastic 44 to be introduced into the dumbbell 20, so that the resulting hard foam mass 46 is larger than the filling of a space corresponding to the interior of the jacket, when it can expand freely. By using more plastic 44 than is required to just filling the dumbbell 20, the resulting density of the foam 46 becomes greater. This magnifies

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the structural strength and diminishes the possibility a leak. It also improves this measure the ingress of foam into the splice itself.

Once the foam mass 46 has hardened, the dumbbell 20 is no longer needed. However, Ur can also be left lamer on the wrapper for convenience or for whatever additional protection.

The time required for the hardness of the plastic compound 46 to Expanding and hardening is required, can approximate 10 minutes to be fixed. This one is much better than the 45 minutes it takes to cure and Reinforcing for resin are often required. Hard polyurethane foam or an equivalent mixture of polyol and isocyanate can be used to form the mass 46 can also be used.

To increase the density of the hard foam plastic 46 and the penetration of the plastic foam 46 into the splice 10, a porous cushion 48 can be arranged in the jacket 20 The cushion 48 can consist of a coarse, open-cell foam plastic exist, such as for example for air filters or the like. is used. This pillow 48 m is placed where the cable splice 10 in the dumbbell 20 comes to rest. The activated plastic 44 can then be poured over this cushion 48 and the dumbbell 20 to be closed. Due to the open-cell structure of the cushion 48, the activated plastic 44 penetrates the cushion and flows to the flexible strip 26 of the jacket 20. When the jacket 20 is closed, the cushion

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sen 48 curved round, butts against itself and forms a semi-continuous support around the splice 10 The activated plastic 44 then expands around and in the cushion 48. The cushion 48 will undergo this expansion oppose and thereby increase the final density of the foamed plastic mass 46. When expanding of the activated plastic 44, the foaming substance is set in motion by the foaming pressure in its interior brought. Under the restrained effect of the pillow 4ü the foaming substance is pressed by itself into the cable splice 10 and fills all cavities the end. The cushion 43 also gives the envelope some strength.

To facilitate the assembly of this cover, rigid spacers that can still be deformed in cold conditions can be provided. Only one such spacer 49 is shown in FIGS. 1 and 2, but two spacers 49, namely one at each end, are expedient. The spacer 49 is slit into two tabs at one end. These tabs are shown in Figure 1 prior to assembly. When assembling the sheath, the end of each spacer provided with the tabs is bent around the cable, as can be seen in FIG. The spacer is hereby held in place with respect to the cable and the splice when the sheath is being assembled. At the end of the spacer opposite the tabs, a fastening element 50 can be provided for fastening the spacer to the strips 34 and 6. In this way, the spacer 49 holds the strips 34 and 36 in a suitable position relative to the cable 12 and 14. So that you can deal with the

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Spacers can easily bypass, they are expediently made of aluminum.

In order to ensure a good seal on cables with polyethylene non-sheathing, on each side of the splice 10 mastic in rings 51 and 52 around the cables 12 and 14. These mastic rings 51 and 52 are arranged so that they are within the 3chauakunetstoff mass 46 are. The mastic can be any commercially available putty such as uncured butyl rubber. the Mastic rings 51 and 52 have the property of being on well the hard Schaurakunststoffnasse 46 and also on the Polyethylene sheathing of the cables 12 and 14 to be glued. This creates a barrier that prevents moisture from binding between the hard Schaura plastic compound 46 and the cables 12 and 14,

The first embodiment described can also be designed so that it allows later access to the splice. Such a design is shown in FIG. It has a flexible plastic sheet 54 which is wrapped around the splice 10 and at both ends by rubber bands 56 or the like. is being held. Two tear-open wires 5Θ are then provided on each side of the cable splice 10. These tear-off wires can be made of 20 gauge stainless steel wire. Stainless steel is suggested for its durability in an underground environment

709830/0760

The tear wires 58 can be held down by rubber bands 56 will. The tear wires 53 run through Mastic rings 50 and 52 therethrough in order to avoid leakage along these tear-off wires 58. The wrapping can then be assembled in the usual way

If one needs to regain access to the cable splice, the sheath 22 can be removed and the tear wires 53 can be pulled through the rigid foam plastic mass 46. The inner sheath is then exposed and can easily be removed to gain access to the splice.

The tear-open wires shown in FIG. 6 are removed from the rest of the material 54 for the sake of clarity. Preferably, however, these wires lie directly on the foil 54 so that all of the hard foam * plastic 46 can be cut open.

In the case of a cable splice which, as shown in FIGS 4, connecting two adjacent cables, a second, less complicated sheath can be used be used. In this embodiment, two cables 60 and 62 run to a splice part Connect i.in Hchutzkonttkt connector and a terminal 66 the two cables 60 and 62 together. Such a splice can be used in a cable line where all ends of the cables to be spliced together as shown in Figures 3 and 4, can be brought together.

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The cables 60 and 62 become the compressible Foam plastic material wrapped, which is also the case with the L.nddi cn dunking 24 and 26 was used. Through this becomes a sin seal; 68 created. The squeezable one Foam plastic is preferably placed between cables 60 and 62 as well as around these cables laid around to form a sufficient seal. The material here generally has the form an 8th pound in flexible plastic tubing 70 will then slid over splice 64 and compressed against seal 68. Then a well-known strip of tape becomes 72 around the seal 68 and the compressed tube 70 laid. This creates a seal between the hose 70 and the cables 60 and 62. These The seal is not waterproof, but it forms a strong seal that prevents the flow of foaming Prevents plastic material along the cable.

This wrapping also includes a plastic bag This plastic bag 74 and the tube 70 can both consist of a polyethylene film. The bag 74 and the hose 70 expediently have the same diameter in the expanded state, so that the hose 70 and bag 74 both together withstand the radial expansion of the foam at the same time. Much like the first The hose 70 and the bag act as an embodiment initially as a form for the hard foam plastic when it expanüert in the envelope.

When the seal 68 is complete, it is activated Plastic is poured into the interior of the hose 70.

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The plastic is for the sake of clarity not shown. The tube 70 is then folded at 75 uci and the bag 74 is pulled over the assembled device. The bag 74 is here up to the Fold 75 in tube 70 pulled all the way down.

As the activated plastic begins to foam, it will initially expand so that it acts on the tube 70 and the bag 74 at the lower end of the envelope in the area of the seal 66, the foam against the inner sides of the tube 70 and against the concentric When the bag 74 begins to exert pressure, the friction holds the bag in place and prevents it from sliding upward off the tube 70. The expanding foam is then pushed upward under the side support of the tube 70 and bag 74. Lr will occasionally lift the fold 75 in the tube 70 and begin to push the fold 75 out of the tube 70. This unfolding of the tube 70 is prevented, however, because the folded over part of the tube 70 is held between the lower part of the tube 70 and the side wall of the bag 74. The foam here also exerts a radial pressure against the inside of the tube 70, which holds the fold in position and the plastic bag 74 on the tube 70.

There are air holes at the top of the plastic bag 74 3 76 is provided so that no gas pressure builds up in the bag 74 and the bag is pulled off the hose 70 prematurely

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Qa3 interaction of>: chlöuch 7ΰ and bag 74 at Strengths of the crease indicated in the hose 70 and while keeping the bag lilted on the hose don hard foam within a limited volume expand. This leads to an increase in the density of the foam, which gives it greater resistance and impenetrable.

The expanded envelope is shown in FIGS. 4 and 5 in chain-dotted lines. In some cases it might not be necessary to use the pouch 74? the hose alone is then sufficient to form the cable sheathing. This is particularly the case when activated resin is poured into the ohhlsuch 70 instead of foam plastic.

v / ic in the embodiment shown in FIG To further increase the density of the foam, a porous Kiss & n 78 can be used to seal the foam to penetrate the splice 64 and to reinforce the entire cable splice enclosure. The pillow 7ö is conveniently provided with a hole at 90 and over the cable ends 60 and 62 arranged. Here, the coarse-meshed cushion 73 can be "divided" before the splice 64 is made. If the pad 78 is pre-positioned, there will be a smaller hole or smaller holes are necessary in the middle of the pillow. A folded bead of mastic may also be used in the cables 60 and 62 near the seal 68. The mastic adheres well to the polyethylene sheath of cables 60 and 62 and will be in the sheath that forms embedded from hard foam plastic. The putty

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prevents water from penetrating the Inside between the cables 60 and 62 and the hard foam plastic mass.

third embodiment of ο na is shown in Figure 5, './ leather is a seal on cables 86 and 88 by wrapping a flexible, compressible piece of foam plastic around cables 86 and 88 manufactured. The cable and seals are then in the opening, which is arranged at 90 in the flexible plastic casing 92, is pressed in. Then can Resin 94 are poured into the envelope 92 and harden. In this application, a conduit 96 is shown extending up around splices 96 and 100 extends and extends to cables 102 and 104.

In all three embodiments, a seal is placed around the cable, which serves to prevent the outflow of a internal sealant and that is not actually intended to prevent moisture ingress Report 2Xt. The sheaths also act and outer wrappings primarily as molds for positioning the foamed plastics or resin. These are used in the first two embodiments Molds also serve to limit the expansion of the foam so as to reduce the final density of the to enlarge hard foam plastic mass, which forms the cable pleat sheath. In this way, of the invention, the outer housing or shell construction made of inexpensive and easily machinable materials exist. The formed by the foamed plastic

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The internal construction has the structural hardness and impermeability required for underground cable splice casings. \! hen the splice is made einiaal, wrapping all AusXührungsbeispielen can be produced quickly and easily and the foam are added, which hardens in a much shorter time than would-Urahüllungen Iwabelspleiß is the case with resin in the known.

The invention is not limited to the exemplary embodiments limited, but a large number of modifications and changes are possible for the person skilled in the art, without thereby exceeding the scope of the invention will.

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Claims (15)

Preformed line; Products Company
Pe 422 2702b7B Expectations Device for wrapping a Kabe1spielßes, characterized by at least one at a distance from the splice (10,64,93,100) around the cable (s) (12, 14 or 60, 62 or 06, 38) wound elastic seal (24, 26 or 68 or 84) made of porous material, one adjacent to the seal and the splice surrounding film (26 or 70 or 92) and a solid Ächauastoffkörper (46), which is bounded by the film and the elastic seal interior fills out. 2.) Device according to claim 1, characterized in that the seal (24,26 or 68, or 84) consists of one soft foam plastic, the solid foam body (46) made of a hard foam plastic and the The foil surrounding the splice (28 or 70 or 92) consists of flexible plastic. 3.) Device according to claim 1 or 2, characterized in that between the splice (10,64,98,100) and the elastic seal (24,26,68,84) at least one mastic ring (51,52) is arranged, which the cable (12 or 14) and is in the solid Foam body (46) extends. 4.) Device according to one of claims 1 to 3, characterized characterized in that inside the splice (10) 709830 ^ 7 * 0 2 7 ü 2 b 7 b surrounding film (28) another film (5 * 0 arranged which is tightly wrapped around the splice. 5.) Device according to one of claims 1 to 4, characterized characterized in that at least one tear-open wire (58) is arranged in the sheath (20), which extends along the cables (12, 14) and inside the further film (5 * 0). 6.) Device according to one of claims 1 to 5 »thereby characterized in that the tear wire (5B) passes through the mastic ring (51 »52). 7.) Device according to one of claims 1 to 6, characterized in that the film surrounding the splice (70) consists of a tube which is compressed at one end around the elastic seal (68) and that over the tube (70 ) a bag (74) is placed inside, which in the expanded state has essentially the same diameter as the tube (70). 8.) Device according to one of claims 1 to 7, characterized characterized in that the other, free end of the tube (70) is folded over and the bag (74) is pulled over this fold (75) on the hose (70). 9 ·) Device according to one of claims 1 to 8, characterized characterized in that inside the film 709830/0760 ORIGINAL INSPECTiO 2 7 Ü 2 b 7 b (213,70) a porous cushion (/ + 3 or 7ö) is arranged which surrounds the splice (10 or 6A) at least partially. 10.) Device according to one of claims 1 to 9 »thereby characterized in that at the closed end of the bag (7 * 0 air holes (76) are arranged. 11.) Device according to one of claims 1 to 10, characterized through a line (72 or 34, 36,40) for printing together the film (26 or 70) and pressing en the elastic seal (24,26 or ob) and on the cable. 12.) Device according to one of claims 1 to 11, characterized characterized in that the compression device consists of two strips (34,36) on the free, opposite longitudinal edges the I'oliö (23) are arranged and by clamping devices (40) are held together adjacent to one another. 13 ·.) A method for producing a cable splice casing, characterized in that an elastic material is first arranged between the cables and around them, that a casing is then placed around the cables and the splice so that the A label is wrapped around the elastic material and a seal is formed so that the UiahUllung is then at least partially filled with a hardening material, which according to its strength forms a rigid body around the splice 709830/0760 BADORIQINAL 2 7 U 2 b 7 b uixc that prior to the filling of the erhürtenden Iiateriolc hßstix-Ivin / e between the cable splice and, zuseiancndriickbcrcn seals around the cables gtjlc £ t. 14.) Method according to claim 1 “ ^; Characterized gekennsoichnet that when wrapping the cable and the: is pressed to the zusaamendrückbare seal Herun will splice a flexible .jchlcuch around the splice golegt dcx "and the upper ~ nde unfolded and that pulled over the tube is a plastic bag v / ith. 15.) A method for producing a cable splice sheath, in particular according to claim 13 or 14, characterized by the following process steps: a) Wrap around the cable at a distance from the splice at least one piece of flexible. ^ chaumkun fabric; b) Laying a flexible film around the splice and the flexible plastic piece; c) attaching the flexible foils to the foam plastic piece j d) Activating a plastic material and closing it foam with a hard plastic foam allow; 709830/0760 ORIGINAL INSPECTED 2 7 O 2 b 7 b e) pouring the activated plastic into the flexible foil; imd atm Schauia «kuriststof.f 'be ^ n-nzten u f) Pre-closure of the flexible film but the splice. 709830/0760
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